summaryrefslogtreecommitdiff
path: root/cmd/podman/inspect/inspect.go
blob: f2952741284fd48e1944a7e669a69d51caca65c0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
package inspect

import (
	"context"
	"fmt"
	"os"
	"strings"

	"github.com/containers/buildah/pkg/formats"
	"github.com/containers/podman/v2/cmd/podman/registry"
	"github.com/containers/podman/v2/cmd/podman/validate"
	"github.com/containers/podman/v2/pkg/domain/entities"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
	"github.com/spf13/cobra"
)

const (
	// ImageType is the image type.
	ImageType = "image"
	// ContainerType is the container type.
	ContainerType = "container"
	// AllType can be of type ImageType or ContainerType.
	AllType = "all"
)

// AddInspectFlagSet takes a command and adds the inspect flags and returns an
// InspectOptions object.
func AddInspectFlagSet(cmd *cobra.Command) *entities.InspectOptions {
	opts := entities.InspectOptions{}

	flags := cmd.Flags()
	flags.BoolVarP(&opts.Size, "size", "s", false, "Display total file size")
	flags.StringVarP(&opts.Format, "format", "f", "json", "Format the output to a Go template or json")
	flags.StringVarP(&opts.Type, "type", "t", AllType, fmt.Sprintf("Specify inspect-oject type (%q, %q or %q)", ImageType, ContainerType, AllType))

	validate.AddLatestFlag(cmd, &opts.Latest)
	return &opts
}

// Inspect inspects the specified container/image names or IDs.
func Inspect(namesOrIDs []string, options entities.InspectOptions) error {
	inspector, err := newInspector(options)
	if err != nil {
		return err
	}
	return inspector.inspect(namesOrIDs)
}

// inspector allows for inspecting images and containers.
type inspector struct {
	containerEngine entities.ContainerEngine
	imageEngine     entities.ImageEngine
	options         entities.InspectOptions
}

// newInspector creates a new inspector based on the specified options.
func newInspector(options entities.InspectOptions) (*inspector, error) {
	switch options.Type {
	case ImageType, ContainerType, AllType:
		// Valid types.
	default:
		return nil, errors.Errorf("invalid type %q: must be %q, %q or %q", options.Type, ImageType, ContainerType, AllType)
	}
	if options.Type == ImageType {
		if options.Latest {
			return nil, errors.Errorf("latest is not supported for type %q", ImageType)
		}
		if options.Size {
			return nil, errors.Errorf("size is not supported for type %q", ImageType)
		}
	}
	return &inspector{
		containerEngine: registry.ContainerEngine(),
		imageEngine:     registry.ImageEngine(),
		options:         options,
	}, nil
}

// inspect inspects the specified container/image names or IDs.
func (i *inspector) inspect(namesOrIDs []string) error {
	// data - dumping place for inspection results.
	var data []interface{} //nolint
	var errs []error
	ctx := context.Background()

	if len(namesOrIDs) == 0 {
		if !i.options.Latest {
			return errors.New("no containers or images specified")
		}
	}

	tmpType := i.options.Type
	if i.options.Latest {
		if len(namesOrIDs) > 0 {
			return errors.New("--latest and containers cannot be used together")
		}
		tmpType = ContainerType // -l works with --type=all
	}

	// Inspect - note that AllType requires us to expensively query one-by-one.
	switch tmpType {
	case AllType:
		allData, allErrs, err := i.inspectAll(ctx, namesOrIDs)
		if err != nil {
			return err
		}
		data = allData
		errs = allErrs
	case ImageType:
		imgData, allErrs, err := i.imageEngine.Inspect(ctx, namesOrIDs, i.options)
		if err != nil {
			return err
		}
		errs = allErrs
		for i := range imgData {
			data = append(data, imgData[i])
		}
	case ContainerType:
		ctrData, allErrs, err := i.containerEngine.ContainerInspect(ctx, namesOrIDs, i.options)
		if err != nil {
			return err
		}
		errs = allErrs
		for i := range ctrData {
			data = append(data, ctrData[i])
		}
	default:
		return errors.Errorf("invalid type %q: must be %q, %q or %q", i.options.Type, ImageType, ContainerType, AllType)
	}

	// Always print an empty array
	if data == nil {
		data = []interface{}{}
	}

	var out formats.Writer
	if i.options.Format == "json" || i.options.Format == "" { // "" for backwards compat
		out = formats.JSONStructArray{Output: data}
	} else {
		out = formats.StdoutTemplateArray{Output: data, Template: inspectFormat(i.options.Format)}
	}
	if err := out.Out(); err != nil {
		logrus.Errorf("Error printing inspect output: %v", err)
	}
	if len(errs) > 0 {
		if len(errs) > 1 {
			for _, err := range errs[1:] {
				fmt.Fprintf(os.Stderr, "error inspecting object: %v\n", err)
			}
		}
		return errors.Errorf("error inspecting object: %v", errs[0])
	}
	return nil
}

func (i *inspector) inspectAll(ctx context.Context, namesOrIDs []string) ([]interface{}, []error, error) {
	var data []interface{} //nolint
	allErrs := []error{}
	for _, name := range namesOrIDs {
		ctrData, errs, err := i.containerEngine.ContainerInspect(ctx, []string{name}, i.options)
		if err != nil {
			return nil, nil, err
		}
		if len(errs) == 0 {
			data = append(data, ctrData[0])
			continue
		}
		imgData, errs, err := i.imageEngine.Inspect(ctx, []string{name}, i.options)
		if err != nil {
			return nil, nil, err
		}
		if len(errs) > 0 {
			allErrs = append(allErrs, errors.Errorf("no such object: %q", name))
			continue
		}
		data = append(data, imgData[0])
	}
	return data, allErrs, nil
}

func inspectFormat(row string) string {
	r := strings.NewReplacer(
		"{{.Id}}", formats.IDString,
		".Src", ".Source",
		".Dst", ".Destination",
		".ImageID", ".Image",
	)
	return r.Replace(row)
}